JPS6026918Y2 - Abrasive material classification device in wet blasting equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an abrasive material classification device in a wet blasting device.

In wet plast equipment, which uses high-pressure water to project an abrasive material (iron sand) onto a strip at high speed for descaling, surface grinding, and surface finishing, the abrasive material wears out and becomes finer during circulation. The fine iron sand is removed by classification using a cyclone.

Specifically, as shown in Fig. 1, raw water is transferred from a slurry tank a containing raw water containing abrasive material for descaling via header C to classification cyclones d and e.

Iron sand (coarse particle iron sand) g, which can be classified and reused by being guided to f, is recovered from the lower part of the classification cyclones d, e, and f to a header h, and then returned to a slurry tank a.

However, since the classification ability of cyclones is limited, the raw water i that has passed through cyclones d, e, and f contains a considerable amount of coarse iron sand in addition to fine iron sand.

However, in the past, there was no suitable classification device for re-classifying the iron sand in the raw water flowing out from the cyclones to recover coarse particles of iron sand, and cyclones d and e were used.

The coarse iron sand in the raw water that has passed through F is mixed with the fine iron sand and is discharged from the bottom of the settling tank J together with the fine iron sand, which is uneconomical because not all of the coarse iron sand can be recycled. Ta.

In the figure, ] is a pump, and m is a flow path that leads raw water overflowing from settling tank j to a water storage tank.

In view of the above, the present invention was devised to provide a classification device that can efficiently recover coarse iron sand from raw water without classifying using a cyclone. A first sedimentation tank is provided with a plurality of inclined plates whose inclination angle can be adjusted at intervals in the middle part, a raw water inlet communicating with the raw water outlet of the first sedimentation tank is installed in the lower part, and a raw water outlet is provided in the upper part. The apparatus is characterized in that it includes a second settling tank in which a plurality of inclined plates are provided at intervals in the middle part.

Embodiments of the present invention will be described below with reference to the drawings.

The classification device of the present invention is equipped with two settling tanks I and II.

The first sedimentation tank I has a tank body 1, which has a pocket D on the side, a raw water outlet 3 communicating with the pocket at the bottom, and a raw water outlet 4 at the top, in the middle part of the tank body 1. A plurality of inclined plates 5 are positioned at intervals from each other, and the upper ends of the inclined plates 5 are rotatably connected to a rod 6 extending in the horizontal direction.

A roller 7 is rotatably provided at the lower end of each inclined plate 5,
The roller 7 is guided by a guide rail 8 extending in the horizontal direction so that it can be moved.

One end of the rod 6 is rotatably attached to the tank body 1, and the inclination angle of each inclined plate 5 can be adjusted by moving the free end of the rod 6 up and down by appropriate means.

One end of a piping 9 for deriving iron sand communicates with the bottom of the tank body 1, and a pump 10 is provided in the middle of the piping 9.

11 is a motor that drives the pump 10, and 12 is a flow path that leads the raw water flowing out from the slurry tank 23 containing the abrasive material and water during descaling to the pocket P of the first settling tank.

The second sedimentation tank (2) has a tank main body 2 with a raw water outlet 14 in its lower part that communicates with the raw water outlet 4 of the first sedimentation tank via a communication channel 13, and a raw water outlet 15 in its upper part. A plurality of inclined plates 16 extending in a direction intersecting with the inclined plate 5 of the first sedimentation tank are arranged in the middle part of the tank body 2 at intervals from each other.

One end of a piping 17 for deriving iron sand communicates with the bottom of the tank body 2, and a pump 18 is provided in the middle of the piping 17.

19 is a motor that drives the pump 18, and 20 is a flow path that leads raw water overflowing from the second settling tank to a water storage tank.

In the above embodiment, the raw water flowing out from the slurry tank 23 at an appropriate upward flow rate V is guided from the channel 12 to the lower part of the tank body 1 of the first settling tank and rises inside the tank body 1 at an appropriate upward flow rate V. When the inclined plate 5 is kept at an appropriate inclination angle, the coarse iron sand 21 in the raw water collides with the inclined plate 5, is prevented from rising, and eventually settles at the bottom of the tank body.

The raw water that has risen between the inclined plates 5 overflows from the raw water outlet 4 and flows into the lower part of the tank main body of the second sedimentation tank through the communication channel 13.

When performing classification in the second sedimentation tank, a flocculant is added to the raw water in advance to flocculate the fine iron sand particles in the raw water, and when the raw water is raised in the tank body 2 in this state, the fine iron sand particles are 22 collides with the inclined plate 16, is prevented from rising, and eventually settles at the bottom of the tank body.

Coarse particle iron sand 21 precipitated in the first settling tank is discharged from piping 9 and reused, and fine particle iron sand 22 precipitated in the second sedimentation tank is discharged from piping 17 and disposed of.

Since the raw water overflowing from the raw water outlet 15 of the second settling tank has been purified through the above steps, it is led to the water storage tank and reused.

According to the classification device of the present invention, it is possible to eliminate the conventional classification using a cyclone as described above, and the particle size classification of iron sand in raw water can be easily adjusted by changing the angle of the inclined plate. Since it can be efficiently recovered, equipment costs can be reduced, and the strip surface treatment operation in a wet blasting apparatus can be performed economically, which is an excellent effect.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a conventional device, and FIG. 2 is a sectional view showing an embodiment of the present invention. ■...First sedimentation tank, ■...Second sedimentation tank, 1.2...tank body, 3,14...
・Raw water inlet, 4゜15...Raw water outlet, 5,16
... Slanted plate, 13 ... Communication channel, 21
... Coarse particle iron sand, 22... Fine particle iron sand.

Claims (1)

[Scope of utility model registration request] A first sedimentation tank with a raw water inlet at the bottom, a raw water outlet at the top, and a plurality of inclined plates with adjustable inclination angles installed at intervals in the middle, and raw water in the first sedimentation tank at the bottom. A wet plast equipment characterized by having a raw water inlet communicating with the outlet, a raw water outlet in the upper part, and a second sedimentation tank in which a plurality of inclined plates are provided at intervals in the middle part. Sweeping material classification device.